Add config flow for cloudflare (#41167)

* add config flow for cloudflare

* Create const.py

* work on flow.

* remove const.

* lint.

* Apply suggestions from code review

Co-authored-by: J. Nick Koston <nick@koston.org>

* Update config_flows.py

* Update homeassistant/components/cloudflare/strings.json

* Apply suggestions from code review

* Apply suggestions from code review

* Apply suggestions from code review

* Update strings.json

* Apply suggestions from code review

* Update __init__.py

* Update __init__.py

Co-authored-by: J. Nick Koston <nick@koston.org>

tests/components/cloudflare/test_init.py

@@ -0,0 +1,58 @@
+"""Test the Cloudflare integration."""
+from pycfdns.exceptions import CloudflareConnectionException
+
+from homeassistant.components.cloudflare.const import DOMAIN, SERVICE_UPDATE_RECORDS
+from homeassistant.config_entries import (
+    ENTRY_STATE_LOADED,
+    ENTRY_STATE_NOT_LOADED,
+    ENTRY_STATE_SETUP_RETRY,
+)
+
+from . import ENTRY_CONFIG, init_integration
+
+from tests.common import MockConfigEntry
+
+
+async def test_unload_entry(hass, cfupdate):
+    """Test successful unload of entry."""
+    entry = await init_integration(hass)
+
+    assert len(hass.config_entries.async_entries(DOMAIN)) == 1
+    assert entry.state == ENTRY_STATE_LOADED
+
+    assert await hass.config_entries.async_unload(entry.entry_id)
+    await hass.async_block_till_done()
+
+    assert entry.state == ENTRY_STATE_NOT_LOADED
+    assert not hass.data.get(DOMAIN)
+
+
+async def test_async_setup_raises_entry_not_ready(hass, cfupdate):
+    """Test that it throws ConfigEntryNotReady when exception occurs during setup."""
+    instance = cfupdate.return_value
+
+    entry = MockConfigEntry(domain=DOMAIN, data=ENTRY_CONFIG)
+    entry.add_to_hass(hass)
+
+    instance.get_zone_id.side_effect = CloudflareConnectionException()
+    await hass.config_entries.async_setup(entry.entry_id)
+
+    assert entry.state == ENTRY_STATE_SETUP_RETRY
+
+
+async def test_integration_services(hass, cfupdate):
+    """Test integration services."""
+    instance = cfupdate.return_value
+
+    entry = await init_integration(hass)
+    assert entry.state == ENTRY_STATE_LOADED
+
+    await hass.services.async_call(
+        DOMAIN,
+        SERVICE_UPDATE_RECORDS,
+        {},
+        blocking=True,
+    )
+    await hass.async_block_till_done()
+
+    instance.update_records.assert_called_once()